from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of a class of highly reactive organic chemical compounds obtained by oxidation of primary alcohols, characterized by the common group CHO, and used in the manufacture of resins, dyes, and organic acids.
- n. See acetaldehyde.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of a large class of reactive organic compounds (R·CHO) having a carbonyl functional group attached to one hydrocarbon radical and a hydrogen atom.
from the GNU version of the Collaborative International Dictionary of English
- n. A colorless, mobile, and very volatile liquid obtained from alcohol by certain processes of oxidation.
- n. Any compound having the group -CHO. Methyl aldehyde, the simplest aldehyde, is more commonly called formaldehyde, H-CHO, and acetic aldehyde is now more commonly called acetaldehyde. The higher aldehydes may be solids. A reducing sugar typically contains the aldehyde group.
from The Century Dictionary and Cyclopedia
- n. A transparent colorless liquid, CH3COH, of pungent suffocating odor, produced by the oxidation of ordinary alcohol.
- n. The general name of a class of compounds intermediate between alcohols and acids, derived from their corresponding primary alcohols by the oxidation and removal of two atoms of hydrogen, and converted into acids by the addition of an atom of oxygen.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. any of a class of highly reactive chemical compounds; used in making resins and dyes and organic acids
German Aldehyd, from New Latin al. dehyd., abbr. for alcohol dehydrogenātum, dehydrogenized alcohol.(American Heritage® Dictionary of the English Language, Fourth Edition)
A contraction of the Latin al(cohol) dehyd(rogenātum). (Wiktionary)